Progress in radiometry: measurement techniques and analysis methods

Adam D. Devir; Ami Ben-Shalom; Leslie Salem Balfour; Michael Y. Engel; Shlomo Levin

doi:10.1117/12.280382

13 August 1997 Progress in radiometry: measurement techniques and analysis methods

Adam D. Devir, Ami Ben-Shalom, Leslie Salem Balfour, Michael Y. Engel, Shlomo Levin

Proceedings Volume 3061, Infrared Technology and Applications XXIII; (1997) https://doi.org/10.1117/12.280382
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

Remote sensing is based on the ability to measure accurately the spectral radiance of remote objects in the object plane. This ability is limited by the measuring system (resolution and sensitivity) and by the atmospheric transmittance, especially when long distances are involved. As a result, the need to enhance S/N led us to develop new measurements techniques and analysis methods. This presentation deals with two different techniques of modern radiometry -- point spectroradiometry with moderate spectral resolution and spatial radiometry (imaging systems) with low spectral resolution. This presentation will address three issues related to advanced analysis methods of radiometric measurements: (1) The effect of the exact shape of the slit- function of the point radiometer on the results of the spectral analysis, (2) the optimal calculation of a signature from radiometric imager, and (3) the correcting factor that must be introduced into the analysis of a spatial picture of point target which is much smaller than the IFOV of the imaging system (star detection). The experience and knowledge gained by IMOD and EORD in the area of radiometric analysis was implemented in a user friendly software (TIRAS) that is used for the radiometric (and not temperature) analysis of various spatial radiometers. The radiometric data was measured for various applications of IMOD such as data bases of targets and backgrounds, and study of radiometric behavior of IR scene elements.

Citation Download Citation

Adam D. Devir, Ami Ben-Shalom, Leslie Salem Balfour, Michael Y. Engel, and Shlomo Levin "Progress in radiometry: measurement techniques and analysis methods", Proc. SPIE 3061, Infrared Technology and Applications XXIII, (13 August 1997); https://doi.org/10.1117/12.280382

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